Second match (rematch) Deep Blue versus Garry Kasparov was a pair of six-game chess matches between then-world chess champion Garry Kasparov and an IBM supercomputer called Deep Blue.
The second match was the first defeat of a reigning world chess champion by a computer under tournament conditions, and was the subject of a documentary film, Game Over: Kasparov and the Machine.
[1][2] After the match, it was reported that IBM had dismantled Deep Blue, but in fact it remained in operation for several years.
He noted the evolution of chess engines, indicating that modern ones easily surpass Deep Blue.
[10] It is widely played in China, South Korea, and Japan, and was considered one of the four arts of the Chinese scholar in antiquity.
Kasparov played in what could be called a preemptive style, blocking all Deep Blue's development attempts.
Deep Blue had a configuration error so it played the entire game without its opening book, but its "extended book" managed to reproduce opening theory up to move 13, by scoring moves based on its dataset of 700,000 previous grandmaster games.
As in the first game, Kasparov played the Sicilian Defence to which Deep Blue again responded with the Alapin Variation.
Game 5 was considered an embarrassment for the Deep Blue team because they had declined Kasparov's draw offer after the 23rd move.
By the end of the game, Deep Blue's pieces were crammed into its queenside corner, with no moves to make aside from shuffling its king.
Kasparov eventually resigned, although post-game analysis indicates that he could have held a draw in the final position.
After this game Kasparov accused IBM of cheating, by alleging that a grandmaster (presumably a top rival) had been behind a certain move.
Another person in that film, four-time US champion Yasser Seirawan, then concludes that "The computer had left its king a little un-defended.
ignored material gain by force and was too sophisticated for a computer, suggesting there had been some sort of human intervention during the game.
The fourth game began with the initial moves defining the Caro–Kann Defence (1.e4 c6); however, the opening then transposed to the Pirc Defense.
The fifth game of the rematch began identically with the first, with a line of the Réti Opening developing into the King's Indian Attack.
As in the fourth game, Deep Blue played a brilliant endgame that secured a draw, when it was looking as if Kasparov would win.
Deep Blue made a knight sacrifice which wrecked Kasparov's defense and forced him to resign in less than twenty moves.
As Kasparov later recounts, he chose to play a dubious opening in an effort to put Deep Blue out of its comfort zone.
Although the knight sacrifice is a well-known refutation, Kasparov reasoned that an engine wouldn't play the move without a concrete gain.